"Price Tag" is a song by English singer-songwriter Jessie J, featuring American rapper B.o.B. It was released on 25 January 2011, in the United Kingdom as the second single from Jessie J's debut studio album, Who You Are (2011). "Price Tag" was written by Jessie J, Dr. Luke, Claude Kelly and B.o.B, and it was produced by Dr. Luke. It serves as the album's lead single in the United States. An official remix features British rapper Devlin. The song debuted at number one on the UK Singles Chart. Elsewhere, the single also topped the charts in Ireland and New Zealand, becoming Jessie J's first number-one single in all these countries and her native United Kingdom. In the United States, "Price Tag" peaked at number 23 on the Billboard Hot 100. Additionally, the song charted at number one in nineteen countries, becoming Jessie J's biggest hit to date. The song was also the biggest-selling collaboration of the year in the UK. At the 2012 Brit Awards, "Price Tag" was nominated for Best British Single.

Jessie J has performed the song live many times, with other singers filling in for B.o.B or his verse being completely removed. The video features an oversized teddy bear, a money tree, and Jessie J as a ballerina in a large jewellery box. The single has sold 1,240,000 copies in the UK as of October 2015 and over three million copies worldwide. The song was covered by The Wombats on BBC Radio 1's Live Lounge on 31 May 2011. In December 2011, Jessie J recorded a Christmas-themed version of the song, with an interpolation of "Jingle Bells", featuring vocals from British singer-songwriter Jan.

"Price Tag" is an up-tempo, "feel good" track, inflected with reggae bounce and a sing-along chorus with powerful vocals from Jessie J, slinky guitars, and a vintage backbeat. The drum beat for the song bears a striking resemblance to that of "Zimba Ku" by Black Heat, whose record label have filed a lawsuit alleging copyright infringement.

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